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275 lines
6.1 KiB
275 lines
6.1 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (C) 2012 Invensense, Inc. |
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*/ |
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#include <linux/acpi.h> |
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#include <linux/delay.h> |
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#include <linux/err.h> |
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#include <linux/i2c.h> |
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#include <linux/iio/iio.h> |
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#include <linux/module.h> |
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#include <linux/of_device.h> |
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#include <linux/property.h> |
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#include "inv_mpu_iio.h" |
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static const struct regmap_config inv_mpu_regmap_config = { |
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.reg_bits = 8, |
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.val_bits = 8, |
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}; |
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static int inv_mpu6050_select_bypass(struct i2c_mux_core *muxc, u32 chan_id) |
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{ |
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return 0; |
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} |
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static bool inv_mpu_i2c_aux_bus(struct device *dev) |
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{ |
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struct inv_mpu6050_state *st = iio_priv(dev_get_drvdata(dev)); |
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switch (st->chip_type) { |
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case INV_ICM20608: |
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case INV_ICM20609: |
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case INV_ICM20689: |
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case INV_ICM20602: |
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case INV_IAM20680: |
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/* no i2c auxiliary bus on the chip */ |
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return false; |
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case INV_MPU9150: |
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case INV_MPU9250: |
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case INV_MPU9255: |
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if (st->magn_disabled) |
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return true; |
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else |
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return false; |
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default: |
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return true; |
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} |
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} |
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static int inv_mpu_i2c_aux_setup(struct iio_dev *indio_dev) |
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{ |
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struct inv_mpu6050_state *st = iio_priv(indio_dev); |
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struct device *dev = indio_dev->dev.parent; |
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struct device_node *mux_node; |
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int ret; |
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/* |
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* MPU9xxx magnetometer support requires to disable i2c auxiliary bus. |
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* To ensure backward compatibility with existing setups, do not disable |
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* i2c auxiliary bus if it used. |
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* Check for i2c-gate node in devicetree and set magnetometer disabled. |
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* Only MPU6500 is supported by ACPI, no need to check. |
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*/ |
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switch (st->chip_type) { |
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case INV_MPU9150: |
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case INV_MPU9250: |
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case INV_MPU9255: |
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mux_node = of_get_child_by_name(dev->of_node, "i2c-gate"); |
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if (mux_node != NULL) { |
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st->magn_disabled = true; |
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dev_warn(dev, "disable internal use of magnetometer\n"); |
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} |
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of_node_put(mux_node); |
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break; |
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default: |
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break; |
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} |
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/* enable i2c bypass when using i2c auxiliary bus */ |
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if (inv_mpu_i2c_aux_bus(dev)) { |
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ret = regmap_write(st->map, st->reg->int_pin_cfg, |
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st->irq_mask | INV_MPU6050_BIT_BYPASS_EN); |
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if (ret) |
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return ret; |
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} |
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return 0; |
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} |
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/** |
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* inv_mpu_probe() - probe function. |
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* @client: i2c client. |
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* @id: i2c device id. |
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* |
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* Returns 0 on success, a negative error code otherwise. |
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*/ |
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static int inv_mpu_probe(struct i2c_client *client, |
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const struct i2c_device_id *id) |
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{ |
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const void *match; |
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struct inv_mpu6050_state *st; |
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int result; |
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enum inv_devices chip_type; |
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struct regmap *regmap; |
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const char *name; |
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if (!i2c_check_functionality(client->adapter, |
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I2C_FUNC_SMBUS_I2C_BLOCK)) |
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return -EOPNOTSUPP; |
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match = device_get_match_data(&client->dev); |
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if (match) { |
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chip_type = (uintptr_t)match; |
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name = client->name; |
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} else if (id) { |
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chip_type = (enum inv_devices) |
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id->driver_data; |
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name = id->name; |
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} else { |
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return -ENOSYS; |
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} |
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regmap = devm_regmap_init_i2c(client, &inv_mpu_regmap_config); |
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if (IS_ERR(regmap)) { |
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dev_err(&client->dev, "Failed to register i2c regmap: %pe\n", |
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regmap); |
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return PTR_ERR(regmap); |
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} |
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result = inv_mpu_core_probe(regmap, client->irq, name, |
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inv_mpu_i2c_aux_setup, chip_type); |
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if (result < 0) |
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return result; |
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st = iio_priv(dev_get_drvdata(&client->dev)); |
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if (inv_mpu_i2c_aux_bus(&client->dev)) { |
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/* declare i2c auxiliary bus */ |
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st->muxc = i2c_mux_alloc(client->adapter, &client->dev, |
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1, 0, I2C_MUX_LOCKED | I2C_MUX_GATE, |
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inv_mpu6050_select_bypass, NULL); |
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if (!st->muxc) |
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return -ENOMEM; |
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st->muxc->priv = dev_get_drvdata(&client->dev); |
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result = i2c_mux_add_adapter(st->muxc, 0, 0, 0); |
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if (result) |
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return result; |
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result = inv_mpu_acpi_create_mux_client(client); |
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if (result) |
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goto out_del_mux; |
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} |
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return 0; |
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out_del_mux: |
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i2c_mux_del_adapters(st->muxc); |
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return result; |
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} |
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static int inv_mpu_remove(struct i2c_client *client) |
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{ |
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struct iio_dev *indio_dev = i2c_get_clientdata(client); |
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struct inv_mpu6050_state *st = iio_priv(indio_dev); |
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if (st->muxc) { |
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inv_mpu_acpi_delete_mux_client(client); |
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i2c_mux_del_adapters(st->muxc); |
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} |
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return 0; |
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} |
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/* |
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* device id table is used to identify what device can be |
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* supported by this driver |
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*/ |
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static const struct i2c_device_id inv_mpu_id[] = { |
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{"mpu6050", INV_MPU6050}, |
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{"mpu6500", INV_MPU6500}, |
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{"mpu6515", INV_MPU6515}, |
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{"mpu6880", INV_MPU6880}, |
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{"mpu9150", INV_MPU9150}, |
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{"mpu9250", INV_MPU9250}, |
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{"mpu9255", INV_MPU9255}, |
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{"icm20608", INV_ICM20608}, |
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{"icm20609", INV_ICM20609}, |
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{"icm20689", INV_ICM20689}, |
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{"icm20602", INV_ICM20602}, |
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{"icm20690", INV_ICM20690}, |
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{"iam20680", INV_IAM20680}, |
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{} |
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}; |
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MODULE_DEVICE_TABLE(i2c, inv_mpu_id); |
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static const struct of_device_id inv_of_match[] = { |
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{ |
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.compatible = "invensense,mpu6050", |
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.data = (void *)INV_MPU6050 |
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}, |
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{ |
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.compatible = "invensense,mpu6500", |
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.data = (void *)INV_MPU6500 |
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}, |
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{ |
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.compatible = "invensense,mpu6515", |
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.data = (void *)INV_MPU6515 |
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}, |
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{ |
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.compatible = "invensense,mpu6880", |
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.data = (void *)INV_MPU6880 |
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}, |
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{ |
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.compatible = "invensense,mpu9150", |
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.data = (void *)INV_MPU9150 |
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}, |
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{ |
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.compatible = "invensense,mpu9250", |
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.data = (void *)INV_MPU9250 |
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}, |
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{ |
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.compatible = "invensense,mpu9255", |
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.data = (void *)INV_MPU9255 |
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}, |
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{ |
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.compatible = "invensense,icm20608", |
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.data = (void *)INV_ICM20608 |
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}, |
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{ |
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.compatible = "invensense,icm20609", |
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.data = (void *)INV_ICM20609 |
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}, |
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{ |
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.compatible = "invensense,icm20689", |
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.data = (void *)INV_ICM20689 |
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}, |
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{ |
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.compatible = "invensense,icm20602", |
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.data = (void *)INV_ICM20602 |
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}, |
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{ |
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.compatible = "invensense,icm20690", |
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.data = (void *)INV_ICM20690 |
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}, |
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{ |
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.compatible = "invensense,iam20680", |
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.data = (void *)INV_IAM20680 |
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}, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(of, inv_of_match); |
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static const struct acpi_device_id __maybe_unused inv_acpi_match[] = { |
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{"INVN6500", INV_MPU6500}, |
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{ }, |
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}; |
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MODULE_DEVICE_TABLE(acpi, inv_acpi_match); |
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static struct i2c_driver inv_mpu_driver = { |
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.probe = inv_mpu_probe, |
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.remove = inv_mpu_remove, |
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.id_table = inv_mpu_id, |
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.driver = { |
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.of_match_table = inv_of_match, |
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.acpi_match_table = ACPI_PTR(inv_acpi_match), |
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.name = "inv-mpu6050-i2c", |
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.pm = &inv_mpu_pmops, |
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}, |
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}; |
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module_i2c_driver(inv_mpu_driver); |
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MODULE_AUTHOR("Invensense Corporation"); |
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MODULE_DESCRIPTION("Invensense device MPU6050 driver"); |
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MODULE_LICENSE("GPL");
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